Onychostoma elongatum (Pellegrin & Chevey 1934)

Horny sheath of lower jaw without a sharp, cutting edge; body slender, depth 4.5-4.8 times in SL; two pairs of barbels present (maxillary barbels very small); last simple dorsal ray slender and not serrated posteriorly (Ref. 43281).

Onychostoma elongatum is a species of cyprinid in the genus Onychostoma. It inhabits Laos and Vietnam and has a maximum length of 11.5 centimetres (4.5 in).